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<front>
<journal-meta>
<journal-id journal-id-type="publisher">AMT</journal-id>
<journal-title-group>
<journal-title>Atmospheric Measurement Techniques</journal-title>
<abbrev-journal-title abbrev-type="publisher">AMT</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Atmos. Meas. Tech.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1867-8548</issn>
<publisher><publisher-name>Copernicus Publications</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/amt-6-2239-2013</article-id>
<title-group>
<article-title>Improvement of OMI ozone profile retrievals in the upper troposphere and lower stratosphere by the use of a tropopause-based ozone profile climatology</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Bak</surname>
<given-names>J.</given-names>
<ext-link>https://orcid.org/0000-0002-0421-671X</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Liu</surname>
<given-names>X.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Wei</surname>
<given-names>J. C.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Pan</surname>
<given-names>L. L.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Chance</surname>
<given-names>K.</given-names>
<ext-link>https://orcid.org/0000-0002-7339-7577</ext-link>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Kim</surname>
<given-names>J. H.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Pusan National University, Busan, Korea</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Harvard–Smithsonian Center for Astrophysics, Cambridge, MA, USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Adnet Systems, Inc., Rockville, MD, USA</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>NASA Goddard Space Flight Center, Greenbelt, MD, USA</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>National Center for Atmospheric Research, Boulder, CO, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>03</day>
<month>09</month>
<year>2013</year>
</pub-date>
<volume>6</volume>
<issue>9</issue>
<fpage>2239</fpage>
<lpage>2254</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2013 J. Bak et al.</copyright-statement>
<copyright-year>2013</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/3.0/">https://creativecommons.org/licenses/by/3.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://amt.copernicus.org/articles/6/2239/2013/amt-6-2239-2013.html">This article is available from https://amt.copernicus.org/articles/6/2239/2013/amt-6-2239-2013.html</self-uri>
<self-uri xlink:href="https://amt.copernicus.org/articles/6/2239/2013/amt-6-2239-2013.pdf">The full text article is available as a PDF file from https://amt.copernicus.org/articles/6/2239/2013/amt-6-2239-2013.pdf</self-uri>
<abstract>
<p>Motivated by the need of obtaining a more accurate global ozone distribution
in the upper troposphere and lower stratosphere (UTLS), we have investigated
the use of a tropopause-based (TB) ozone climatology in ozone profile
retrieval from the Ozone Monitoring Instrument (OMI). Due to the limited
vertical ozone information in the UTLS region from OMI backscattered
ultraviolet radiances, better climatological a priori information is
important for improving ozone profile retrievals. We present the new TB
climatology and evaluate the result of retrievals against previous work. The
TB climatology is created using ozonesonde profiles from 1983 through 2008
extended with climatological ozone data above sonde burst altitude
(~35 km) with the corresponding temperature profiles used to
identify the thermal tropopause. The TB climatology consists of the mean
states and 1σ standard deviations for every month for each 10°
latitude band. Compared to the previous TB climatology by Wei et al. (2010),
three additional processes are applied in deriving our climatology:
(1) using a variable shifting offset to define the TB coordinate, (2) separating
ozonesonde profiles into tropical and extratropical regimes based on a
threshold of 14 km in the thermal tropopause height, and (3) merging with an
existing climatology from 5–10 km above the tropopause. The first process
changes the reference of profiles to a variable position between local and
mean tropopause heights within ±5 km of the tropopause and to the
mean tropopause elsewhere. The second helps to preserve characteristics of
either tropical or extratropical ozone structures depending on tropopause
height, especially in the subtropical region. The third improves the
climatology above ozonesonde burst altitudes and in the stratosphere by
using climatology derived from many more satellite observations of ozone
profiles. With aid from the National Centers for Environmental Prediction
(NCEP) Global Forecast System (GFS) tropopause height, the new climatology
and retrieval can better represent the dynamical variability of ozone in the
tropopause region. The new retrieval result demonstrates significant
improvement of UTLS ozone, especially in the extratropical UTLS, when
evaluated using ozonesonde measurements and the meteorological data. The use
of TB climatology significantly enhances the spatial consistency and the
statistical relationship between ozone and potential vorticity/tropopause
height in the extratropical UTLS region. Comparisons with ozonesonde
measurements show substantial improvements in both mean biases and their
standard deviations over the extratropical lowermost stratosphere and upper troposphere.
Overall, OMI retrievals with the TB climatology show improved ability in
capturing ozone gradients across the tropopause found in
tropical/extratropical ozonesonde measurements.</p>
</abstract>
<counts><page-count count="16"/></counts>
</article-meta>
</front>
<body/>
<back>
<ref-list>
<title>References</title>
<ref id="ref1">
<label>1</label><mixed-citation publication-type="other" xlink:type="simple">Beekmann, M., Ancellet, G., and M$\dote$gie, G.: Climatology of tropospheric ozone in southern Europe and its relation to potential vorticity, J. Geophys. Res., 99, 12841–12853, &lt;a href=&quot;http://dx.doi.org/10.1029/94JD00228&quot;&gt;https://doi.org/10.1029/94JD00228&lt;/a&gt;, 1994.</mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple">Bhartia, P. K., McPeters, R. D., Mateer, C. L., Flynn, L. E., and Wellemeyer, C.: Algorithm for the estimation of vertical ozone profiles from the backscattered ultraviolet technique, J. Geophys. Res., 101, 18793–18806, &lt;a href=&quot;http://dx.doi.org/10.1029/96JD01165&quot;&gt;https://doi.org/10.1029/96JD01165&lt;/a&gt;, 1996.</mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple">Birner, T.: Fine-scale structure of the extratropical tropopause region, J. Geophys. Res., 111, D04104, &lt;a href=&quot;http://dx.doi.org/10.1029/2005JD006301&quot;&gt;https://doi.org/10.1029/2005JD006301&lt;/a&gt;, 2006.</mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple">Birner, T.: Recent widening of the tropical belt from global tropopause statistics: Sensitivities, J. Geophys. Res., 115, D23109, &lt;a href=&quot;http://dx.doi.org/10.1029/2010JD014664&quot;&gt;https://doi.org/10.1029/2010JD014664&lt;/a&gt;, 2010.</mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple">Chance, K. V., Burrows, J. P., Perner, D., and Schneider, W.: Satellite measurements of atmospheric ozone profiles, including tropospheric ozone, from ultraviolet/visible measurements in the nadir geometry: a potential method to retrieve tropospheric ozone, J. Quant. Spectrosc. Ra., 57, 467–476, 1997.</mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple">Considine, D. B., Logan, J. A., and Olsen, M. A.: Evaluation of near-tropopause ozone distributions in the Global Modeling Initiative combined stratosphere/troposphere model with ozonesonde data, Atmos. Chem. Phys., 8, 2365–2385, &lt;a href=&quot;http://dx.doi.org/10.5194/acp-8-2365-2008&quot;&gt;https://doi.org/10.5194/acp-8-2365-2008&lt;/a&gt;, 2008.</mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple">de Forster, P. M. F. and Shine, K. P.: Radiative forcing and temperature trends from stratospheric ozone changes, J. Geophys. Res., 102, 10841–10855, &lt;a href=&quot;http://dx.doi.org/10.1029/96JD03510&quot;&gt;https://doi.org/10.1029/96JD03510&lt;/a&gt;, 1997.</mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple">de Forster, P. M. F. and Tourpali, K.: Effect of tropopause height changes on the calculation of ozone trends and their radiative forcing, J. Geophys. Res., 106, 12241–12252, &lt;a href=&quot;http://dx.doi.org/10.1029/2000JD900813&quot;&gt;https://doi.org/10.1029/2000JD900813&lt;/a&gt;, 2001.</mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple">ESA – European Space Agency: The GOME Users Manual, edited by: Bednarz, F., ESA Publication SP-1182, ESA Publications Division, ESTEC, Noordwijk, the Netherlands, 1995.</mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple">Hegglin, M. I., Boone, C. D., Manney, G. L., Shepherd, T. G., Walker, K. A., Bernath, P. F., Daffer, W. H., Hoor, P., and Schiller, C.: Validation of ACE-FTS satellite data in the upper troposphere/lower stratosphere (UTLS) using non-coincident measurements, Atmos. Chem. Phys., 8, 1483–1499, &lt;a href=&quot;http://dx.doi.org/10.5194/acp-8-1483-2008&quot;&gt;https://doi.org/10.5194/acp-8-1483-2008&lt;/a&gt;, 2008.</mixed-citation>
</ref>
<ref id="ref11">
<label>11</label><mixed-citation publication-type="other" xlink:type="simple">Hegglin, M. I., Boone, C. D., Manney, G. L., and Walker, K. A.: A global view of the extratropical tropopause transition layer from Atmospheric Chemistry Experiment Fourier Transform Spectrometer O&lt;sub&gt;3&lt;/sub&gt;, H&lt;sub&gt;2&lt;/sub&gt;O, and CO, J. Geophys. Res., 114, D00B11, &lt;a href=&quot;http://dx.doi.org/10.1029/2008JD009984&quot;&gt;https://doi.org/10.1029/2008JD009984&lt;/a&gt;, 2009.</mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple">Hoinka, K. P.: The tropopause: discovery, definition and demarcation, Meteorol. Z., 6, 281–303, 1997.</mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple">Holton, J. R., Haynes, P. H., McIntyre, M. E., Douglass, A. R., Rood, R. B., and Pfister, L.: Stratosphere-troposphere exchange, Rev. Geophys., 33, 403–439, &lt;a href=&quot;http://dx.doi.org/10.1029/95RG02097&quot;&gt;https://doi.org/10.1029/95RG02097&lt;/a&gt;, 1995.</mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple">Homeyer, C. R., Bowman, K. P., and Pan, L. L.: Extratropical tropopause transition layer characteristics from high-resolution sounding data, J. Geophys. Res., 115, D13108, &lt;a href=&quot;http://dx.doi.org/10.1029/2009JD013664&quot;&gt;https://doi.org/10.1029/2009JD013664&lt;/a&gt;, 2010.</mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple">Kuang, S., Newchurch, M. J., Burris, J., Wang, L., Knupp, K., and Huang, G.: Stratosphere-to-troposphere transport revealed by ground-based lidar and ozonesonde at a midlatitude site, J. Geophys. Res., 117, D18305, &lt;a href=&quot;http://dx.doi.org/10.1029/2012JD017695&quot;&gt;https://doi.org/10.1029/2012JD017695&lt;/a&gt;, 2012.</mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple">Kunz, A., Pan, L. L., Konopka, P., Kinnison, D. E., and Tilmes, S.: Chemical and dynamical discontinuity at the extratropical tropopause based on START08 and WACCM analyses, J. Geophys. Res., 116, D24302, &lt;a href=&quot;http://dx.doi.org/10.1029/2011JD016686&quot;&gt;https://doi.org/10.1029/2011JD016686&lt;/a&gt;, 2011.</mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple">Langford, A. O.: Stratosphere-troposphere exchange at the subtropical jet: Contribution to the tropospheric ozone budget at midlatitudes, Geophys. Res. Lett., 26, 2449–2452, &lt;a href=&quot;http://dx.doi.org/10.1029/1999GL900556&quot;&gt;https://doi.org/10.1029/1999GL900556&lt;/a&gt;, 1999.</mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple">Levelt, P. F., van den Oord, G. H. J., Dobber, M. R., Malkki, A., Visser, H., de Vries, J., Stammes, P., Lundell, J. O. V., and Saari, H.: The Ozone Monitoring Instrument, IEEE T. Geosci. Remote, 44, 1093–1101, &lt;a href=&quot;http://dx.doi.org/10.1109/TGRS.2006.872333&quot;&gt;https://doi.org/10.1109/TGRS.2006.872333&lt;/a&gt;, 2006.</mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple">Liu, X., Chance, K., Sioris, C. E., Spurr, R. J. D., Kurosu, T. P., Martin, R. V., and Newchurch, M. J.: Ozone profile and tropospheric ozone retrievals from Global Ozone Monitoring Experiment: algorithm description and validation, J. Geophys. Res., 110, D20307, &lt;a href=&quot;http://dx.doi.org/10.1029/2005JD006240&quot;&gt;https://doi.org/10.1029/2005JD006240&lt;/a&gt;, 2005.</mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple">Liu, X., Chance, K., Sioris, C. E., Kurosu, T. P., and Newchurch, M. J.: Intercomparison of GOME, ozonesonde, and SAGE-II measurements of ozone: Demonstration of the need to homogenize available ozonesonde datasets, J. Geophys. Res., 101, D114305, &lt;a href=&quot;http://dx.doi.org/10.1029/2005JD006718&quot;&gt;https://doi.org/10.1029/2005JD006718&lt;/a&gt;, 2006.</mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple">Liu, X., Bhartia, P. K., Chance, K., Spurr, R. J. D., and Kurosu, T. P.: Ozone profile retrievals from the Ozone Monitoring Instrument, Atmos. Chem. Phys., 10, 2521–2537, &lt;a href=&quot;http://dx.doi.org/10.5194/acp-10-2521-2010&quot;&gt;https://doi.org/10.5194/acp-10-2521-2010&lt;/a&gt;, 2010a.</mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple">Liu, X., Bhartia, P. K., Chance, K., Froidevaux, L., Spurr, R. J. D., and Kurosu, T. P.: Validation of Ozone Monitoring Instrument (OMI) ozone profiles and stratospheric ozone columns with Microwave Limb Sounder (MLS) measurements, Atmos. Chem. Phys., 10, 2539–2549, &lt;a href=&quot;http://dx.doi.org/10.5194/acp-10-2539-2010&quot;&gt;https://doi.org/10.5194/acp-10-2539-2010&lt;/a&gt;, 2010b.</mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple">Logan, J. A.: An analysis of ozonesonde data for the troposphere: Recommendations for testing 3-D models and development of a gridded climatology for tropospheric ozone, J. Geophys. Res., 104, 16115–16149, &lt;a href=&quot;http://dx.doi.org/10.1029/1998JD100096&quot;&gt;https://doi.org/10.1029/1998JD100096&lt;/a&gt;, 1999.</mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple">McPeters, R. D., Heath, D. F., and Bhartia, P. K.: Average Ozone Profiles for 1979 From the NIMBUS 7 SBUV instrument, J. Geophys. Res., 89, 5199–5214, &lt;a href=&quot;http://dx.doi.org/10.1029/JD089iD04p05199&quot;&gt;https://doi.org/10.1029/JD089iD04p05199&lt;/a&gt;, 1984.</mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple">McPeters, R. D., Labow, G. J., and Logan, J. A.: Ozone climatological profiles for satellite retrieval algorithms, J. Geophys. Res., 112, D05308, &lt;a href=&quot;http://dx.doi.org/10.1029/2005JD006823&quot;&gt;https://doi.org/10.1029/2005JD006823&lt;/a&gt;, 2007.</mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple">Meijer, Y. J., Swart, D. P. J., Baier, F., Bhartia, P. K., Bodeker, G. E., Casadio, S., Chance, K., Del Frate, F., Erbertseder, T., Felder, M. D., Flynn, L. E., Godin-Beekmann, S., Hansen, G., Hasekamp, O. P., Kaifel, A., Kelder, H. M., Kerridge, B. J., Lambert, J. C., Landgraf, J., Latter, B., Liu, X., McDermid, I. S., Pachepsky, Y., Rozanov, V., Siddans, R., Tellmann, S., van der A, R. J., van Oss, R. F., Weber, M., and Zehner, C.: Evaluation of Global Ozone Monitoring Experiment (GOME) ozone profiles from nine different algorithms, J. Geophys. Res., 111, D21306, &lt;a href=&quot;http://dx.doi.org/10.1029/2005JD006778&quot;&gt;https://doi.org/10.1029/2005JD006778&lt;/a&gt;, 2006.</mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple">Pan, L. L. and Munchak, L. A.: Relationship of cloud top to the tropopause and jet structure from CALIPSO data, J. Geophys. Res., 116, D12201, &lt;a href=&quot;http://dx.doi.org/10.1029/2010JD015462&quot;&gt;https://doi.org/10.1029/2010JD015462&lt;/a&gt;, 2011.</mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple">Pan, L. L., Randel, W. J., Gary, B. L., Mahoney, M. J., and Hintsa, E. J.: Definitions and sharpness of the extratropical tropopause: A trace gas perspective, J. Geophys. Res., 109, D23103, &lt;a href=&quot;http://dx.doi.org/10.1029/2004JD004982&quot;&gt;https://doi.org/10.1029/2004JD004982&lt;/a&gt;, 2004.</mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple">Pan, L. L., Wei, J. C., Kinnison, D. E., Garcia, R. R., Wuebbles, D. J., and Brasseur, G. P.: A set of diagnostics for evaluating chemistry-climate models in the extratropical tropopause region, J. Geophys. Res., 112, D09316, &lt;a href=&quot;http://dx.doi.org/10.1029/2006JD007792&quot;&gt;https://doi.org/10.1029/2006JD007792&lt;/a&gt;, 2007.</mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple">Pittman, J. V., Pan, L. L., Wei, J. C., Irion, F. W., Liu, X., Maddy, E. S., Barnet, C. D., Chance, K., and Gao, R.-S.: Evaluation of AIRS, IASI, and OMI ozone profile retrievals in the extratropical tropopause region using in situ aircraft measurements, J. Geophys. Res., 114, D24109, &lt;a href=&quot;http://dx.doi.org/10.1029/2009JD012493&quot;&gt;https://doi.org/10.1029/2009JD012493&lt;/a&gt;, 2009.</mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple">Randel, W. J., Seidel, D. J., and Pan, L. L.: Observational characteristics of double tropopauses, J. Geophys. Res., 112, D07309, &lt;a href=&quot;http://dx.doi.org/10.1029/2006JD007904&quot;&gt;https://doi.org/10.1029/2006JD007904&lt;/a&gt;, 2007.</mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple">Rodgers, C. D.: Inverse methods for Atmospheric Sounding: Theory and Practice, World Scientific Publishing, Singapore, 2000.</mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple">Santer, B. D., Wigley, T. M. L., Simmons, A. J., K$\dota$llberg, P. W., Kelly, G. A., Uppala, S. M., Ammann, C., Boyle, J. S., Brüggemann, W., Doutriaux, C., Fiorino, M., Mears, C., Meehl, G. A., Sausen, R., Taylor, K. E., Washington, W. M., Wehner, M. F., and Wentz, F. J.: Identification of anthropogenic climate change using a second-generation reanalysis, J. Geophys. Res., 109, D21104, &lt;a href=&quot;http://dx.doi.org/10.1029/2004JD005075&quot;&gt;https://doi.org/10.1029/2004JD005075&lt;/a&gt;, 2004.</mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple">Steinbrecht, W., Claude, H., Köhler, U., and Hoinka, K. P.: Correlations between tropopause height and total ozone: Implications for long-term changes, J. Geophys. Res., 103, 19183–19192, &lt;a href=&quot;http://dx.doi.org/10.1029/98JD01929&quot;&gt;https://doi.org/10.1029/98JD01929&lt;/a&gt;, 1998.</mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple">Tilmes, S., Pan, L. L., Hoor, P., Atlas, E., Avery, M. A., Campos, T., Christensen, L. E., Diskin, G. S., Gao, R.-S., Herman, R. L., Hintsa, E. J., Loewenstein, M., Lopez, J., Paige, M. E., Pittman, J. V., Podolske, J. R., Proffitt, M. R., Sachse, G. W., Schiller, C., Schlager, H., Smith, J., Spelten, N., Webster, C., Weinheimer, A., and Zondlo, M. A.,: An aircraft-based upper troposphere lower stratosphere O&lt;sub&gt;3&lt;/sub&gt;, CO, and H&lt;sub&gt;2&lt;/sub&gt;O climatology for the Northern Hemisphere, J. Geophys. Res., 115, D14303, &lt;a href=&quot;http://dx.doi.org/10.1029/2009JD012731&quot;&gt;https://doi.org/10.1029/2009JD012731&lt;/a&gt;, 2010.</mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple">Varotsos, C., Cartalis, C., Vlamakis, A., Tzanis, C., and Keramitsoglou, I.: The Long-Term Coupling between Column Ozone and Tropopause Properties, J. Climate, 17, 3843–3854, &lt;a href=&quot;http://dx.doi.org/10.1175/1520-0442(2004)017&lt;3843:TLCBCO&gt;2.0.CO;2&quot;&gt;https://doi.org/10.1175/1520-0442(2004)017&lt;3843:TLCBCO&gt;2.0.CO;2&lt;/a&gt;, 2004.</mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple">Wei, J. C., Pan, L. L., Maddy, E., Pittman, J. V., Divarkarla, M., Xiong, X., and Barnet, C.: Ozone profile retrieval from an advanced infrared sounder: Experiments with tropopause-based climatology and optimal estimation approach, J. Atmos. Ocean. Tech., 27, 1123–1139, &lt;a href=&quot;http://dx.doi.org/10.1175/2010JTECHA1384.1&quot;&gt;https://doi.org/10.1175/2010JTECHA1384.1&lt;/a&gt;, 2010.</mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple">WMO – World Meteorological Organization: Meteorology – A three-dimensional science: Second session of the commission for aerology, World Meteorol. Organ. Bull., 4, 134–138, 1957.</mixed-citation>
</ref>
</ref-list>
</back>
</article>